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Finding the Fourth Proportional to 830.20, 1,242.76 and 464.08

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Solution

The fourth proportional to 830.20, 1,242.76 and 464.08 is: 694.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    830.20 : 1,242.76 = 464.08 : x
  2. Step 2: Convert to fraction form
    830.20/1,242.76 = 464.08/x
  3. Step 3: Cross multiply
    830.20x = 1,242.76 × 464.08
  4. Step 4: Simplify right side
    830.20x = 576,740.06
  5. Step 5: Solve for x
    x = 576,740.06/830.20
  6. Step 6: Final answer
    x = 694.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.